Key Highlights:
- Mercedes faced unexpected qualifying struggles at Sepang despite introducing a substantial upgrade package for the W17.
- Kimi Antonelli qualified fourth and George Russell took eighth, though both gain a position due to Isack Hadjar’s grid penalty.
- Team principal Toto Wolff expressed deep concern over straight-line speed deficits to Max Verstappen and heavy low-speed understeer.
Mercedes Puzzled by Sudden Drop in Pace at Sepang
Mercedes entered the race weekend at Sepang with high expectations after introducing a substantial aerodynamic and mechanical upgrade package for the W17. Throughout the 2026 season, the Silver Arrows have enjoyed dominant form, particularly on power-sensitive circuits where their powertrain and straight-line efficiency routinely set the benchmark. Early signs appeared positive when championship leader Kimi Antonelli led the timing sheets in Free Practice 3, teasing another front-running weekend. However, the subsequent qualifying session told a radically different story as the team failed to challenge for the front row.
Antonelli ended qualifying on the second row in fourth position, while teammate George Russell could only manage a disappointing eighth. Although both drivers will move up one spot on the starting grid following a penalty handed to Isack Hadjar, Mercedes leadership found the underlying deficit alarming. Speaking to Sky Sports F1, team principal Toto Wolff admitted that the squad was caught off guard by the car’s handling characteristics on the abrasive Malaysian asphalt.
“Very difficult to understand,”
he told Sky Sports F1. “We have been a little bit caught out on Friday with some car behaviour that we didn’t see all year. But you can say it’s very hard that the tarmac is very different to all the tracks.”
Wolff further detailed the contrast between the morning practice and the high-stakes qualifying rounds: “Looks really good in the morning. You know, we seem to have at least with Kimi made a step in understanding again. Qualifying was a little bit back to what we saw before, just no performance.”
Straight-Line Drag and Low-Speed Understeer Raise Alarms
When pressed on the precise balance and operational problems hurting the car, Wolff highlighted unusual traits that have not plagued Mercedes so far this year. Most notably, the W17 suffered from excessive drag down the long straights and severe handling limitations through slower sections of the track.
“It looks like we are very draggy, because it’s the first time that we’re losing a lot of time on the straights to especially Max [Verstappen]. And then through the low speed. Turn 2, we are not able to turn the car. There’s just too much understeer. So overall things we haven’t seen all year.”
Because the Mercedes machinery had previously built its reputation around low drag, high top speeds, and exceptional power efficiency, scrutinising glances are shifting directly toward the newly fitted updates. Even so, Wolff believes the aerodynamic concepts themselves remain fundamentally sound, hinting that external variables or setup compromises might be distorting the outcome.
“Something else is going on. And we have to understand. This is now working through the data and putting our heads together because we still believe that the upgrade works. We just need to understand why not here.”
Tyre Degradation and Heat Challenge Sunday Prospects
Beyond aerodynamic drag and balance imbalances, high ambient temperatures and aggressive track abrasiveness have amplified tyre degradation concerns for Mercedes. The swing in expected competitive lap time represents one of the starkest drops the team has encountered during its campaign.
“It’s so different, but nevertheless, in any case you’re expecting three-tenths to kick in and it looks like three or four or five-tenths backwards first time we miss out on the top three by the track. So hard, but I guess we will find the solution.”
Heading into the Grand Prix, Wolff struck a cautious tone regarding whether Sunday’s long-run race pace would offer any relief. When asked if the race could yield better results than qualifying indicated, he refused to make optimistic projections.
“No, I’m never positive,”
Wolff answered. “Even if you would have put it on pole with five-tenths, I wouldn’t have been exuberant for tomorrow.”
He added: “I don’t know at all what to expect tomorrow from the race with the heat. It could be better, it could be worse. This is now about understanding what the car is doing.”
Why This Matters
Mercedes has enjoyed an authoritative position across the 2026 season, making any sudden drop in competitive performance a focal point for the wider championship fight. Missing out on the top three on outright track pace for the first time exposes potential vulnerabilities when the W17 encounters extreme track surfaces and hot climates. With rivals such as Max Verstappen capitalizing on straight-line advantages, Mercedes engineers must determine whether their latest update package has narrowed their operating window or inadvertently compromised their aerodynamic efficiency.
Frequently Asked Questions
Where will Kimi Antonelli and George Russell start the race?
Kimi Antonelli qualified fourth and George Russell qualified eighth. However, both drivers will move up one position on the final starting grid—to third and seventh respectively—after a grid penalty is applied to Isack Hadjar.
What specific issues did Toto Wolff identify on the W17?
Toto Wolff pointed out that the car appeared unusually draggy, costing substantial time on the straights against Max Verstappen. Additionally, severe understeer compromised turn-in through low-speed corners such as Turn 2, alongside heightened tyre degradation in the heat.
Is Mercedes planning to abandon its new upgrade package?
No. Toto Wolff confirmed that the team still believes the upgrade package works as intended. Mercedes engineers are focusing on analysing session data to understand why the car reacted poorly to the unique tarmac and conditions at the circuit.
